Updated at 12:05 p.m. ET.

Former President Barack Obama celebrated Nelson Mandela's life and legacy in South Africa on Tuesday with a speech that focused not only on the freedom Mandela came to symbolize, but the long walk it took to get there.

Immigration is near the top of the list of issues Americans find "the most worrying," according to a new poll conducted for NPR by the research firm Ipsos.

But Americans' views on immigration diverge sharply depending on party affiliation, where in the country we live, and whether we know people who were born outside the United States.

Updated at 4:34 p.m. ET

Charges accusing a woman of trying to build bridges between the Russian government and American political leaders via the National Rifle Association have delivered a breakthrough in understanding one aspect of the attack on the 2016 election: "infiltration."

As the midterm elections get more heated, passionate grassroots donors are opening their wallets to Democrats campaigning against President Trump and the GOP in their quest to take the House.

India has ordered its state governments to inspect child care facilities run by the Missionaries of Charity — the Roman Catholic order founded by Mother Teresa — after arrests of a nun and a worker accused of baby trafficking.

Earlier this month, Indian authorities shut down a shelter home for pregnant, unmarried women run by the order in Ranchi, a city in the eastern state of Jharkhand, after discovering that four infants had been sold, including a 6-month-old boy who changed hands for 50,000 rupees ($730).

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

MARY LOUISE KELLY, HOST:

Director of National Intelligence Dan Coats on Monday directly challenged comments by President Trump, saying the U.S. intelligence community has been "clear in our assessments of Russian meddling in the 2016 election."

Coats has maintained an extremely low profile, rarely making public comments, since President Trump appointed him last year.

Half a million roses have been placed in the shape of a flat-topped pyramid in Tabacundo, Ecuador, in an attempt to enter the Guinness Book of World Records.

Currently, the world record for largest flower arrangement is held by the Dubai Miracle Garden in United Arab Emirates, which created a life-size sculpture of a Airbus A380 in 2016.

Updated at 7:19 p.m. ET

Many Republicans harshly criticized President Trump's performance Monday at a news conference with Russian President Vladimir Putin, in which Trump said Putin's denial that Moscow interfered with the 2016 election is "strong and powerful" — despite U.S. intelligence findings to the contrary.

Russian President Vladimir Putin, who rushed into Syria three years ago in an effort to save his ally President Bashar Assad, now says he can work with the U.S. to bring peace and reconciliation to the war-torn country.

"As far as Syria is concerned," Putin said, standing next to President Trump at the Helsinki summit, "the task of establishing peace and reconciliation in this country could be the first showcase example of this successful joint work."

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